.wc-bookings-date-picker .ui-datepicker td.bookable a {
    background-color: #f1793c !important;
    background-image: none !important;
    border-color: rgba(0,0,0,0.1) !important;
    color: #fff !important;
    text-shadow: 0 1px 0 rgba(0,0,0,0.1);
}